Meyer was hit and miss as well. His story for VI might have some relevance to the period in which it was made, but far moreso that II, it really starts to collapse when seriously thought about.
While that's indeed a problem that can be overcome from time to time, it works to the detriment of VI if one does think about the 'reality' of the chain of events.
In such respect, Meyer's plot for VI is a weaker structural piece than TWOK. Even if the thematic elements help boost it. And even that in TWOK has it's issues around the start up.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist